javascript - Decorating directive with unnamed link function -

how can 1 derocate directive if link function not named. more want decorate select-ui directive. how directive defined:

.directive('uiselect', function() {     return {              restrict: 'ea',              scope: true,              compile: function(telement, tattrs) {                  //some code                  return function(scope, element, attrs, ctrls){                       //some code here                       //how extend this?                  }              }     }  }); 

this how tried, it's giving me error cannot read property 'apply' of undefined, because link function not named in directive :

.decorator('uiselectdirective', function($delegate, restangular){     var directive;     directive = $delegate[0];     console.log(directive, $delegate);     directive.scope = {         endpoint: '=',         items: '=',         parameters: '='     };     directive.compile = function() {         return function($scope, element, attrs){             directive.link.apply(this, arguments);             // custom code here         }     };     return $delegate; }); 

edit

i tried suggested approach, i'm running issues.

.decorator('uiselectdirective', function($delegate, restangular){     var directive;     directive = $delegate[0];     directive.scope = {         endpoint: '=',         items: '=',         parameters: '='     };       directive.compile = function(originalcompile) {         var args = arguments;         return function($scope, element, attrs){             console.log($scope); // here returning element instead of scope?             return originalcompile.apply(this, args);          }     }(directive.compile);       return $delegate; }); 

instead of $scope i'm getting element variable ([div.ui-select-container.ui-select-bootstrap.dropdown]). have error saying tattrs not defined, parameter in main compule function. i'm guessing apply isn't passing arguments function somehow...

do extend compile function:

directive.compile = function(originalcompile) {   return function() {     var oldlink = originalcompile.apply(this, arguments);      return function($scope, element, attrs) {       // custom code link here       return oldlink.apply(this, arguments)     }   } }(directive.compile);